body,html{
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
.box {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    // background-color: rgba(0, 0, 0, 0.4);
    background-color: #FFFFFF;

    .audio {
        width: 800px;
        height: 600px;
        background-color: rgba(255, 255, 255, 0.9);
        .call_box_phone {
            width: 100%;
            height: 100%;
            margin-right: 16px;
            margin-bottom: 16px;
            text-align: center;
            border: 1px solid #eee;
            box-sizing: border-box;
            button {
              width: 160px;
              height: 38px;
              margin-top: 30px;
              color: #fff;
              background: #828282;
              border: none;
              border-radius: 20px;
              cursor: pointer;
              &:hover {
                background-color: red;
              }
            }
            .call_btn {
              display: none;
              margin: 55% auto;
            }
            &:hover {
              .call_btn {
                display: block;
              }
            }
          }
    }
}